import org.apache.commons.io.IOUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;

/**
 * Created by dllo on 18/5/10.
 */
@WebServlet(name = "DownloadServlet",urlPatterns = "/down")
public class DownloadServlet extends HttpServlet {

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 设置响应的编码格式为utf8
        response.setCharacterEncoding("utf8");

        String filename= "作业.zip";
        // 把汉字转换成url编码
        filename = URLEncoder.encode(filename,"utf8");

        // 设置下载响应头
        response.setHeader("Content-Disposition","attachment;filename="+filename) ;

        InputStream is= getServletContext().getResourceAsStream("files/pic.jpg");

        // 向浏览器 写流
        response.getOutputStream().write(IOUtils.toByteArray(is));
    }
}
